Thanks for your answer, but what you write is clear and is for system wide messaging/logging.
I don't want to bloat with all logs, but only the ones related to Xwayland so that it can be easier to narrow the reason why the external monitor connection is not detected with the latest kernel...
BTW: also in journal when thing work ok I seem not to find any particular information about display settings change when I connect external monitor, so I don't know what to compare with....
Gianluca
Some more info.
Also after today updates and new kernel 5.2.9-200.fc30 the problem persists
Some info about hw involved:
laptop Asus ZenBook Flip (model UX370UAR)
monitor is DELL U2412M (not tried yet with other monitors)
usb-c adapter is the default provided with notebook and has power, hdmi and usb
adapter is recognized this way when connected to usb-c of notebook (no cable connected to hdmi yet):
Aug 21 08:43:44 localhost.localdomain kernel: usb 1-1: new high-speed USB device number 4 using xhci_hcd
Aug 21 08:43:44 localhost.localdomain kernel: usb 1-1: New USB device found, idVendor=2109, idProduct=2210, bcdDevice= 6.80
Aug 21 08:43:44 localhost.localdomain kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Aug 21 08:43:44 localhost.localdomain kernel: usb 1-1: Product: USB2.0 Hub
Aug 21 08:43:44 localhost.localdomain kernel: usb 1-1: Manufacturer: VIA Labs, Inc.
Aug 21 08:43:44 localhost.localdomain kernel: hub 1-1:1.0: USB hub found
Aug 21 08:43:44 localhost.localdomain kernel: hub 1-1:1.0: 4 ports detected
Aug 21 08:43:44 localhost.localdomain kernel: usb 2-1: new SuperSpeed Gen 1 USB device number 3 using xhci_hcd
Aug 21 08:43:44 localhost.localdomain kernel: usb 2-1: New USB device found, idVendor=2109, idProduct=0210, bcdDevice= 6.85
Aug 21 08:43:44 localhost.localdomain kernel: usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Aug 21 08:43:44 localhost.localdomain kernel: usb 2-1: Product: USB3.0 Hub
Aug 21 08:43:44 localhost.localdomain kernel: usb 2-1: Manufacturer: VIA Labs, Inc.
Aug 21 08:43:44 localhost.localdomain kernel: hub 2-1:1.0: USB hub found
Aug 21 08:43:44 localhost.localdomain kernel: hub 2-1:1.0: 1 port detected
Aug 21 08:43:46 localhost.localdomain kernel: usb 1-1.2: new high-speed USB device number 5 using xhci_hcd
Aug 21 08:43:47 localhost.localdomain kernel: usb 1-1.2: New USB device found, idVendor=2109, idProduct=0101, bcdDevice= 3.04
Aug 21 08:43:47 localhost.localdomain kernel: usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 21 08:43:47 localhost.localdomain kernel: usb 1-1.2: Product: USB 2.0 BILLBOARD
Aug 21 08:43:47 localhost.localdomain kernel: usb 1-1.2: Manufacturer: VIA Technologies Inc.
Aug 21 08:43:47 localhost.localdomain kernel: usb 1-1.2: SerialNumber: 0000000000000001
When I connect hdmi cable (monitor is powered on and waiting on connection) this happens:
- kernels 5.2.8-200 and 5.2.9-200
no new line in journal
monitor goes into power save mode (something similar when wrong mode is tried or monitor not correctly detected...)
- kernel 5.1.20-300.fc30.x86_64
monitor is detected and previous known configuration applied, see here:
In journal these lines added:
Aug 21 08:57:49 localhost.localdomain kernel: Registered IR keymap rc-cec
Aug 21 08:57:49 localhost.localdomain kernel: rc rc0: DP-1 as /devices/pci0000:00/0000:00:02.0/rc/rc0
Aug 21 08:57:49 localhost.localdomain kernel: input: DP-1 as /devices/pci0000:00/0000:00:02.0/rc/rc0/input34
Aug 21 08:57:49 localhost.localdomain systemd-logind[838]: Watching system buttons on /dev/input/event23 (DP-1)
Thanks in advance and eventually I'm going to open bugzilla for this
Gianluca